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Re: [Discuss-gnuradio] Need help identifying jammer signal

From: Johnathan Corgan
Subject: Re: [Discuss-gnuradio] Need help identifying jammer signal
Date: Tue, 10 Dec 2013 13:55:45 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.1 
On 12/09/2013 07:26 PM, Juha Vierinen wrote:

> I recorded a 10 second snippet of 50 kHz baseband signal in interleaved
> I and Q with 32-bit floating point format.

The signal is definitely frequency modulated, but it doesn't appear to
be by data.  Plotting the unwrap(diff(unwrap(arg(s))) shows a repetitive
structure of 10 ms (500 samples) width, as if something is stepping the
frequency up or down at 100 Hz in a random walk.

-- 
Johnathan Corgan, Corgan Labs
SDR Training and Development Services
http://corganlabs.com

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